We get our sampler discs for the library's Anime Club from ADV. I've never ordered anything directly from them, but they run sales pretty regularly.

I do remember someone on my flist ordering and it took a while, but I haven't heard of anyone receiving damaged discs. I figure the "as is" relates to the packaging -- overstocked items often have marked or drilled barcodes, but they're usually otherwise unopened unless it was returned to a store after someone opened it.

My only caveat on Farscape is whether it's the old editions versus the "Starburst" editions. They had a really bad habit of putting only a few episodes per disc with little in the way of extras on the original version. They made a slight improvement in the Starburst editions by having more extras and selling two-disc packs, but they still didn't have the number of episodes you'd expect, IIRC.